Biodiversity Science ›› 2005, Vol. 13 ›› Issue (5): 376-386.doi: 10.1360/biodiv.050070

Special Issue: Exploring the Mechamism of Species Endangerment and Conservation Strategy in the Rangtze River Drainage

• Special Issue • Previous Article     Next Article

Morphological variation and its adaptive significance for Changnienia amoena, an endangered orchid

Haiqin Sun, Ang Li, Wei Ban, Xiaoming Zheng, Song Ge*   

  1. Laboratory of Systematic and Evolutionary Botany, Institute of Botany, Chinese Academy of Sciences, Beijing 100093
  • Received:2005-03-15 Revised:2005-04-19 Online:2005-09-20
  • Song Ge

Investigation of intraspecific morphological variation is critical for the understanding of evolutionary and ecological processes, and may provide insights for uncovering the roles of natural selection, gene flow, and genetic drift in the distribution and abundance of species diversity. In the present study, we analyzed statistically the patterns of variation of 13 morphological traits among 12 populations in three localities of an endemic orchid, Changnienia amoena. The results showed that, among the three localities, the mean value of all measured morphological traits is the highest in the Lushan populations. There is abundant variation at both the species and population levels. Coefficient of variation (CV) varied between 0.02 and 0.30 at the species level, and the CV values of reproductive organs were lower than those of vegetative structures. ANOVA analysis showed that there was significant difference in most morphological traits among the three localities. UP-GMA analysis showed that the populations in three localities were clustered into three main clades, the populations from Xinning and Lushan formed one clade, while the Shennongjia populations formed another clade. It is noteworthy that the Shennongjia populations were separated into two subclades corresponding to the populations at Longmenhe and Guanmenshan, respectively. This morphological differentiation is most likely a result of pollinator-mediated selection because this species is pollinated by different bumblebee species at these two sites. Pearson correlation analysis showed that high correlation occurred within the vegetative organs, reproductive organs, and be-tween them. These results have important implications for our understanding of the evolutionary processes and mechanism of C. amoena and might provide useful information for the conservation and management of this endangered orchid.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Liang Song-Yun. A New Species of Lilitum from Xizang[J]. J Syst Evol, 1985, 23(5): 392 -393 .
[2] Yue Ming. Division of Successional Phase in The Platycladus orientalis Forest in the South Loess Plateau of the Northern shanxi Province[J]. Chin J Plan Ecolo, 1998, 22(4): 327 -335 .
[3] ZHANG Cheng Yi, YU Fei Hai, DONG Ming. Effects of Sand Burial on the Survival, Growth, and Biomass Allocation in Semi-shrub Hedysarum laeve Seedlings[J]. J Integr Plant Biol, 2002, 44(3): 337 -343 .
[4] Jiliang Xu, Xiaohui Zhang, Zhengwang Zhang, Guangmei Zheng, Xiangfeng Ruan, Keyin Zhang. Home range and habitat use of male Reeves’s pheasant (Syrmaticus reevesii) in winter in Dongzhai National Nature Reserve, Henan Province[J]. Biodiv Sci, 2005, 13(5): 416 -423 .
[5] Zhi-Cheng ZHU, Yin HUANG, Feng-Wei XU, Wen XING, Shu-Xia ZHENG, Yong-Fei BAI. Effects of precipitation intensity and temporal pattern on soil nitrogen mineralization in a typical steppe of Nei Mongol grassland[J]. Chin J Plan Ecolo, 2017, 41(9): 938 -952 .
[6] HUANG Ben-Hong. Late Paleozoic Flora in Nei Mongol Plateau[J]. Chin Bull Bot, 2000, 17(专辑): 172 -178 .
[7] Monica Boscaiu, Cristina Lull, Josep Llinares, Oscar Vicente, Herminio Boira. Proline as a biochemical marker in relation to the ecology of two halophytic Juncus species[J]. J Plant Ecol, 2013, 6(2): 177 -186 .
[8] YU Hua, Bee-Lian ONG. Diurnal Photosynthesis and Carbon Economy of Acacia mangium in English[J]. Chin J Plan Ecolo, 2003, 27(5): 624 -630 .
[9] Xiulei Wang, Diqiang Li, Bo Wu, Hongxiao Yang. Habitat suitability assessment of Przewalski’s gazelle in the Hudong- Ketu area, Qinghai, China[J]. Biodiv Sci, 2005, 13(3): 213 -220 .
[10] Zhang Jingwei. Mallee——A Special Vegetation Type in Australia[J]. Chin J Plan Ecolo, 1983, 7(3): 256 -259 .